Hugh Borbidge, Senior Mechanical Engineer ::::
Are you a good judge of distance? Sometimes not being able to estimate how much room you have can lead to disaster.
In the following case, a man simply walked to his double parked truck and opened his driver side door to get in. At the same time a car carrier was traveling down the street towards the man. Did the man have enough room to open his door with a truck passing by? The whole thing was caught on tape but it was hard to tell how much space was available.
DJS was hired to recreate the scene so we could accurately measure what happened. We collected laser scan data, modeled vehicles and pedestrians and recreated the movement and spatial relationships based on the surveillance video. We were able to determine that had the man waited for the truck to pass, he would have been able to safely open his door and get in.
Hugh Borbidge, BSME, Director of Engineering Animations ::::
There are many ways to re-create vehicle movement in a 3D computer environment. Some methods are better than others. We will talk about 3 different methods; simple, rigged, and physics based.
The simple method is the easiest and fastest method as the name implies. The vehicle is treated as one object. The chassis and wheels do not move independent of each other. They all move as a unit. In the image above, the red lines represent the tire paths. You can see that the front and rear tires follow the same path even as the vehicle makes a turn. This is not scientifically accurate but can sometimes be useful for a “down and dirty” review for things like basic spatial relationships.
Hugh Borbidge, Computer Animation Engineer ::::
Item 101- Accurately Moving a Vehicle on the Computer Screen
3D engineers that do forensic work often times feel a little jealous when we watch a Pixar movie. In Pixar movies vehicles tend to move in such an artistic way. They are seen bopping to music, bending around corners, and even talking. Many times the creative teams behind these movies ignore the laws of physics. But that’s ok, they don’t have to. Accurate engineering animations, on the other hand, do have to abide by the laws of physics. Engineering animations can be (and typically are) highly scrutinized and the slightest inaccuracy can render them such that they are not accepted by the courts.